Lost Sierra Endurance Race

The Lost Sierra Endurance Race, held in Downieville, California, offers challenging trail running events through the scenic Sierra Buttes. Scheduled for July 26, 2025, the race features three distances: 25K, 50K, and 100K. The 100K is an out-and-back course starting in downtown Downieville, passing through rugged single-track trails and five aid stations, with significant elevation gain of over 10,700 feet.

The 50K is a point-to-point route from Plumas-Eureka State Park to Downieville, featuring rocky and smooth trails with two major climbs. The 25K is a looped, less demanding course through river canyons. The event emphasizes community with aid stations, mandatory gear for the 100K, and a post-race BBQ. Visit the organization's website for the most recent information.